Read LG 52LG7000-ZA (CHASSIS:LD88F) Service Manual online
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NG : always RED
No problem
Check LED A’ssy color.
Check remote control
Power key off.
Replace LED A’ssy.
Check P500 VDD voltage
(pin1~4) 12V
(pin1~4) 12V
No problem
No problem
No problem
Check LVDS data
signal(pin11~22, pin27~38)
signal(pin11~22, pin27~38)
No problem
Replace T-con board of
LCD Module.
LCD Module.
No problem
Replace IC100.
Replace regulator.
No problem
Lamp On status
Lamp off
Check inverter lamp
On/Of status.
Check LVDS Cable.
Replace the LVDS Cable.
NG
NG
NG
Check Q501, L502,500,
PANEL_Vcc_EN signal.
PANEL_Vcc_EN signal.
NG
Recheck PSU(+5V, +12V, +16V)
-> If not OK then replace PSU
-> If not OK then replace PSU
Replace PSU
Check the PWM signal
(P1000, pin 22, 21)
Replace the Main B/D.
NG
Re App S/W download.
If not OK then replace IC100.
Check IC502 power block
L1200(1.0V), L1213(1.8V)
IC1204(3.3V), IC1205(3.3V)
IC1206(1.2V)
No problem
Check LED A’ssy.
Replace PSU B/D or Main B/D.
Is the inverter OK?
(INV_CTL signal :
P1000 :pin20)
(INV_CTL signal :
P1000 :pin20)
Re MICOM S/W download
-> If not OK then replace
IC802
-> If not OK then replace
IC802
No problem
No
problem
NG
NG
NG
2. Main Board & Sub FRC B/D
2-1. In case of No Raster
2-1. In case of No Raster
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